JSF tutorial

JSF - Construire une application JSF 2.0

Résumé

Dans ce tutoriel, nous allons construire et exécuter une application Web 2.0 de JSF et mettre en évidence les fonctionnalités offertes par les outils JSF.

Introduction

Le projet JSF fournit des outils qui simplifient la construction des applications Web JSF 2.0. Dans ce tutoriel, nous allons créer et exécuter une application web JSF 2.0.

Installation

Créer un JavaServer Faces Project

Créer une nouvelle application Web dynamique avec le nom de JSFFaceletsTutorial. Réglez le target runtime cible à l'Apache Tomcat 6.0. Dans configuration, cliquez sur Modifier et sélectionnez "JavaServer Faces 2.0". Passer au panneau suivant pour se rendre à la page JSF capabilities.

Sur la page JSF capabilities, à partir du menu déroulant, sélectionnez User Library .

Cliquez sur l'icône Download library . La boîte de dialogue Téléchargement de la bibliothèque est affichée avec la liste des fichiers JAR pour la mise en œuvre de JSF. Sélectionnez JSF 2.0 (Mojarra) . Cliquez sur Suivant. Acceptez la licence et cliquez sur Terminer

L'outil télécharge les fichiers JAR, crée une bibliothèque utilisateur JDT et l'ajoute au projet en cours. Cochez la case Include libraries with this application si elle n'est pas sélectionnée.

Cliquez sur Finish pour créer l'application JavaServer Faces. Vous pouvez être invité à choisir la perspective J2EE à la fin. Cliquez sur OK.

Votre application JSF a été créé.

Créer des modèles de pages Facelets

Vous allez maintenant créer un modèle de page Facelets. Créez un dossier appelé templates dans WEB-INF. Utilisez l'assistant HTML pour créer une page de modèle appelé, BasicTemplate.xhtml dans ce dossier. Faites un clic droit sur le projet, sélectionnez Nouveau » HTML pour lancer l'assistant HTML. Dans la page Sélectionner Modèles de l'assistant, sélectionnez New Facelet Template. Cliquez sur Terminer.

Editez le fichier de modèle en suivant les instructions dans le modèle. Vous allez créer et inclure les tête et pied de modèles. Votre fichier final de modèle doit être comme indiqué ci-dessous.

BasicTemplate.xhtml

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets"> <head> <title><ui:insert name="title">Facelets Tutorial</ui:insert></title> </head> <body> <div id="header"> <ui:insert name="header"> <ui:include src="/WEB-INF/templates/header.xhtml"/> </ui:insert> </div> <div id="content"> <ui:insert name="content"> </ui:insert> </div> <div id="footer"> <ui:insert name="footer"> <ui:include src="/WEB-INF/templates/footer.xhtml"/> </ui:insert> </div> </body> </html>

Create the header and footer templates under the template folder using the New HTML Wizard as described above. In the Select Template page of the wizard, choose the corresponding template files, New Facelet Header and New Facelet Footer. Make changes to the templates as shown below.

Create a JSF Page

Create a JSF page with Facelets tags that will use the template created in the previous step. Use the HTML Page wizard to create a page called login.xhtmlin the Web Content folder of the new application. In the Select Templates page of the wizard, select the New Facelet Composition Page template. Click Finish.

login.xhtml

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core"> <ui:composition template=""> <ui:define name="header"> Add your header here or delete to use the default </ui:define> <ui:define name="content"> Add your content here or delete to use the default </ui:define> <ui:define name="footer"> Add your footer here or delete to use the default </ui:define> </ui:composition> </html>

Facelets Tag Attribute Validation and Content Assist

The JSF Tools project adds support for validating attributes of Facelets tags and also provides Content Assists on them. Note the warning on the templateattribute of the <ui:composition> tag.

Position the cursor in between the double-quotes of the template attribute and hit Ctrl + spacebar to get Content Assist. You should see a pop-up listing the directories under the WebContent folder. Select /WEB-INF/templates/BasicTemplate.xhtml

Complete the JSF page

Delete the <ui:define> tags for the header and footer. The page will get the header and footer from the template. Add the tags for the login in the contentsection as shown below. Please note that the current release of the JSF Tools project doesn't support the visual rendering of an XHTML page in the JSF Web Page Editor. However, all the productivity features available in the Source Page of the Web Page Editor for editing a JSP page are available in the HTML Source Editor for building a JSF Facelets page in XHTML.

login.xhtml

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core"> <ui:composition template="/WEB-INF/templates/BasicTemplate.xhtml"> <ui:define name="content"> <h:form> <h:panelGrid columns="2"> <h:outputText value="Name"></h:outputText> <h:inputText value="#{loginBean.name}"></h:inputText> <h:outputText value="Password"></h:outputText> <h:inputSecret value="#{loginBean.password}"></h:inputSecret> </h:panelGrid> <h:commandButton value="Login" action="login"></h:commandButton> </h:form> </ui:define> </ui:composition> </html>

Configure the Managed Bean

In the Project Explorer, expand the node, JSFFaceletsTutorial->WebContent. Double-click on faces-config.xml . This will launch the Faces Configuration editor. Select the ManagedBean tab.

Click on the Add button. This will launch the New Managed Bean wizard. Select the option, Create a new Java class. In the next wizard panel, enter the package as, com.tutorial and the Name of the class as LoginBean . Click the Finish button.

This will create the Java class and register it as a managed bean. Save the Faces Configuration editor.To edit the Java class, click on the hyperlink,ManagedBean class in the Managed bean page as shown in the figure below. This will launch the Java editor.

Faces Configuration Editor - Managed Bean tab

Edit the Java class, com.tutorial.LoginBean. Add the following code and save.

LoginBean.java

/** * LoginBean.java * */ package com.tutorial; public class LoginBean { private String name; private String password; public String getName () { return name; } public void setName (final String name) { this.name = name; } public String getPassword () { return password; } public void setPassword (final String password) { this.password = password; } }

Add Another Page

Create a new HTML page welcome.xhtml in WebContent with the following content:

welcome.xhtml

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core"> <ui:composition template="/WEB-INF/templates/BasicTemplate.xhtml"> <ui:define name="content"> <h:outputLabel value="Welcome #{loginBean.name}"></h:outputLabel> </ui:define> </ui:composition> </html>

Set up Page Navigation Rules

Double-click on faces-config.xml to open the Faces Configuration Editor. Click on the Navigation Rule tab. Now drag the login.xhtml and welcome.xhtml files from Project Explorer onto the Navigation Rule grid as shown.

Click on the Link tool in the palette on the right. Now draw an arrow from login.xhtml to welcome.xhtml as shown.

Now, click on the arrow and open the Properties view. Click on the button with the ellipses next to the “From Outcome” field

Setting an action for the navigation rule

Select “Login” in this dialog. Click OK

Selecting an action for the navigation rule

Our navigation rule is now set up.

Run the JSF Facelets Page

You will now execute the login.xhtml page against the Apache Tomcat server. Choose Run on Server using the context menu while selecting thelogin.xhtml page in the navigator. Choose your Apache Tomcat server and set it up as required if you had not already done so. Click Finish. You should see from the Console view that the Tomcat server starts and then you should see the executing login page appear in the Web Browser like below.

Congratulations! You have created and executed your first JSF Facelets application.